package club.caihappy.server.controller;

import com.google.code.kaptcha.impl.DefaultKaptcha;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import sun.net.www.content.image.jpeg;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Set;

/**
 * 验证码控制层
 * Created by DELL on 2022/5/19
 **/
@RestController
public class CaptchaController {

    @Autowired
    private DefaultKaptcha defaultKaptcha;

    @ApiOperation("验证码")
    @GetMapping(value = "captcha", produces = "image/jpeg")
    public void captcha(HttpServletRequest request, HttpServletResponse response) {
        //定义response输出类型为image/jpeg类型
        response.setDateHeader("Expires", 0);
        //Set standard HTTP / 1.1 no - cache headers.
        response.setHeader("Cache-Control", "no-store,no-cache,must-revalidate");
        //Set IE extended HTTP/1.1 no - cache headers(use addHeader).
        response.addHeader("Cache-Control", "post-check=0,pre-check=0");
        //Set standard HTTP / 1.0 no - cache header.
        response.setHeader("Pragma", "no-cache");
        //  return a jpeg
        response.setContentType("image/jpeg");

        //---------------生成验证码begin-----------------------
        //创建验证码文本
        String text = defaultKaptcha.createText();
        System.out.println("验证码内容:" + text);
        //将验证码文本放入session
        request.getSession().setAttribute("captcha", text);
        //根据文本内容创建图片
        BufferedImage image = defaultKaptcha.createImage(text);
        ServletOutputStream outputStream = null;
        try {
            outputStream = response.getOutputStream();
            //输出流输出图片，格式为jpg
            ImageIO.write(image, "jpg", outputStream);
            outputStream.flush();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                outputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        //---------------生成验证码end-------------------------


    }
}
